Garmston, Robert J. and Valerie von Frank. Unlocking Group Potential to Improve Schools. (Corwin Press, 2012), 18-19.
Read more of Unlocking Group Potential to Improve Schools here: Section I (Getting Work Done), Ch. 1: Building Effective Groups
Garmston, Robert J. and Valerie von Frank. Unlocking Group Potential to Improve Schools. Corwin Press, 2012.